I have had the same problem. For me it was a problem with the port forwarding of my router. Apparently ipv6 port forwarding didn’t work as I was expecting.
You can check if a port is open using this website Open Port Check Tool - Test Port Forwarding on Your Router
And for me it reported that port 80 was not open even though I forwarded it for both ipv4 and ipv6. Disabling ipv6 support in my router fixed the problem.
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